I vote for drop-ins. That way future upgrades aren't limited by the reflector that the head was designed to fit.
Makes sense to do both...
I've starting with the e-can style head using a McR-20 reflector. Prototypes being made now.
This will at least get options out there for Aleph/E-series heads.
After that, heads for drop-ins. I guess I'll need to buy some for R&D since I've never owned one!
Suggestions anyone?
R-